Downhole degassing and oil removing cyclone separation device

Abstract

The invention discloses a downhole degassing and oil removing cyclone separation device and mainly aims to solve the problem that the downhole oil-water separation effect is limited due to existence of associated gas. The device is characterized in that the cyclone separation device adopts a twin-tangential inlet, so that the tangential and radial pressure required when a to-be-treated liquid is subjected to first-stage degassing separation is guaranteed, meanwhile, a first-stage degassing separation structure is separated from an oil removing separation structure through a barrel, and two stages of separation communicate with each other through hole opening in proper positions; the degassed treated liquid is pressurized and accelerated by a pressurizing part, and thus separation is conducted efficiently; and an oil-water separation structure adopts the two-stage pressurization and two-stage separation manners, and accordingly, the oil-water separation accuracy is improved. With the device, the downhole oil-water separation efficiency can be improved, and the feasibility and the applicability of the downhole oil-water separation system can be enhanced.

Description

technical field [0001] The invention relates to a separation device used in the fields of petroleum, chemical industry, etc., specifically, a separation device used in the separation of oilfield production fluid and sewage treatment. Background technique [0002] With the continuous development of oilfields, the development of many onshore oilfields has entered the middle and later stages, and the water content of oil wells is getting higher and higher, and the water content of many oil wells is greater than 95%. Therefore, how to deal with the produced water is a difficult problem that many oilfields have to face. With the in-depth research, a complete set of downhole oil-water separation and same-well reinjection technology scheme with cyclone equipment as the main separation part has basically been formed. The cyclone separator used for oil-water separation shows good separation performance in the downhole environment. Effect. However, the separation effect is limited du...

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Problems solved by technology

[0003] In order to solve the problems that the oil-water separation equipment used in the current downhole oil-water separation process has poor separation effect and low separation efficiency under gas-containing conditions, and cannot achieve high-efficiency separation of oil-water phases under gas-containing conditions, this invention has passed the national 863 project: Supported by downhole oil-water separation and same-well reinjection technology and equi

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